Would launching spacecraft from the moon be more effective than from earth? I'm thinking that it would take less energy to escape the gravitational pull, and the added revolution would allow for a more significant slingshot effect on the craft. Granted the craft would either have to first be launched from Earth and land on the moon, or it would have to be assembled on the moon. Both would be quite difficult, but would it be worth it? Also, would the absence of an atmosphere make things more difficult, with no outside fuel to interact with, or would it help, because there is "no" resistance?